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Related Questions
what is a defining characteristic in eukaryotic cells? What type of organisms have eukaryotic cells
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Answer:
The defining feature of a eukaryotic cell is the presence of a nucleus. Most animals and plants have eukaryotic cells.
Explanation:
Eukaryotic cells have a nucleus, and membrane-bound organelles All multicellular organisms are made up of eukaryote cells
Eukaryotic cells are one of the two types of cell types prokaryotic and eukaryotic. There are various structural and functional differences found in them.
Eukaryotic cells are defined by:
the presence of a nucleus enclosed by a complex nuclear membranepresence of membrane-bound organellescell wall may or may not be presentcell division is mitosis or meiosisEukaryotic organisms have various range of organisms including mostly all multicellular such as animals, plants, fungi, and protists, as well as most algae. Eukaryotes can be single-celled as well.
Thus, the eukaryotic cells have a nucleus, All multicellular organisms are made up of eukaryote cells
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Which of the following characteristics of enzymes is NOT correct?
A)The substrate is the substance upon which the enzyme acts.
B)The induced-fit or lock and key model describes how enzymes work.
C)An enzyme is unchanged as a result of a reaction.
D)The efficiency of an enzyme is not affected by temperature.
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The statement that represents an incorrect characteristic of enzymes is as follows;
The efficiency of an enzyme is not affected by temperature.Thus, the correct option for this question is D.
What are enzymes?Enzymes may be defined as the type of biocatalysts that significantly increase the rate of a chemical reaction without being changed in the overall process. It is thought that all cellular reactions and processes are mediated by enzymes.
Enzymes include a number of characteristics. Some of them are most of the enzymes are proteins. They are highly specific. They exhibit enormous catalytic power.
The substrate is the substance upon which the enzyme acts. The induced-fit or lock-and-key model describes how enzymes work. The temperature and pH directly affect the efficiency of an enzyme.
Therefore, the correct option for this question is D.
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Which is the final event that occurs when a star is forming?
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Answer:
the outer layer of the star expands
Explanation:
Gravity pulls gas and dust together. A protostar forms as mass increases. A black hole forms as the core collapses.
Answer:
Hence, the final event that occurs when a star is forming is that nuclear fusion begins under high pressure.
Explanation:
A beaker contains 0.64 L of water. What is the volume in milliliters?
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0.64 L in milliliters is 640 milliliters.
1. The first living organism in a food chain is
a) producers
b) primary consumers
c) heterotroph
d) chemosynthesizer
2. The second living organism in a food chain is generally...
a) herbivore
b) carnivore
c) detrivore
d) a photoautotroph
3. Plants use nitrogen to grow and are generally helped by cycling N from the air to the land by bacteria in a process called...
a) nitrogen fixation
b) denitrification
c) decomposition
d) emmigration
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Answer:
1-a 2-a 3-a
1. The first living organism in a food chain is
a) producers
b) primary consumers
c) heterotroph
d) chemosynthesizer
2. The second living organism in a food chain is generally...
a) herbivore
b) carnivore
c) detrivore
d) a photoautotroph
3. Plants use nitrogen to grow and are generally helped by cycling N from the air to the land by bacteria in a process called...
a) nitrogen fixation
b) denitrification
c) decomposition
d) emmigration
Darwin's experiments are just one way to study phototropism. A student wants to investigate the effects of phototropism in bean plants. She places a light source directly above one plant, at a forty‐five degree angle to another, and at a ninety‐degree angle from the third.
What is her independent variable?
What is a hypothesis she might write for her experiment?
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Answer:
Her independent variable is the light source and her hypothesis is what YOU think might happen
Answer:
The independent variable is what is being changed or altered in the experiment (light position), the dependant variable is what is altered or changed by the independent variable (plant).
Explanation:
Consider what is being changed in this experiment to investigate the effects? The plant itself is not changed by the experiment but the positioning of the light source is. That is your independent variable. The plant may change as a result of the independent variable but isn't being altered or changed as part of the method (dependent).
What is a hypothesis she might write?
Consider a hypothesis as a prediction. Researchers come up with their hypothesis based on the information they already know. So to write your hypothesis think about what you already know about phototropism. What do you think will happen to the plant in relation to the positioning of the lamp? Will the plant not move? Will it bend or move to face the lamp?
Hope this helps.
Which statement is part of the cell theory ?
A)all living organisms are made of cells
B)all cells contain DNA that they pass on to daughter cells
C)all cells depend on their surroundings to provide energy
D)all cells have a nucleus
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Answer:
A.
The answer is A bc THe Cell theory is what the conditions cells follow.
Hope this helps! ;)
~Emilie G.
Vernon is using the diagram shown below to develop a model of photosynthesis. The letters A, B, and C each represent a reactant or product of the process.
In the light-dependent reactions, light strikes the oval thylakoids. Compound A enters the thylakoid, and compound B leaves it. In the light-independent reactions, compound C enters a cycle in the stroma, and sugars leave the cycle. ATP and NADPH cycle between the two sets of reactions.
Should water (H2O) be included in the model as a reactant or product? If so, how should it be included?
A. Yes, as reactant A.
B. Yes, as product B.
C. Yes, as reactant C.
D. No, it should not be included.
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Photosynthesis is the process of preparing food in the presence of light, water, and carbon dioxide. Photosynthesis can be light-dependent or light-independent reactions.
The correct answer is:
Option A. Yes, as reactant A.
The mechanism can be explained as:
1. Light-dependent reactions convert light energy into chemical energy.
2. The light-dependent reactions require water and light to yield oxygen, hydrogen, and energy molecules.
3. The light is used to break down the molecule of water into oxygen and hydrogen when the light strikes the thylakoid.
4. The ATP is generated in the stroma of the thylakoid membrane. The excited electrons released during the splitting of water is utilized to produce high-energy molecule.
Thus, water molecule should be used as a reactant because it yields products.
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please help asap i will mark brainliest
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Answer:
a
Explanation:
What is the theory of natural selection, and why does it occur in an organism?
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Answer:
Natural Selection is survival of the fittest aka Darwinism. It basically states that the strongest survive and the weakest don't. Maybe it's through food shortages, bad weather, or predators. It occurs in an organism for population control. If there is too big of a population, then there will be a recourse drought and natural selection will do its thing again.
a data table shows the height of a person on his birthday each year from age 2 to 12. What trend would you expect to see in a lime graph of the data.
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How do you determine the amount of electrons and protons?
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Answer:
The number of protons in the nucleus of an atom is equal to the atomic number
the number of electrons in a neutral atom is equal to the number of protons
Explanation:
Answer:
For both protons and electrons, you need to use the atomic number.
can you help me with this??
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Answer:
Its between the 3rd and fourth but i think its the 3rd
Explanation:
Over various spans of time, human populations have increased, decreased, or remained the same, and at both global and local levels. Which statement best explains this observation?
A. Unlike other populations, the human population changes size because of specific choices of its members.
B. Unlike other populations, the human population has the ability to grow rapidly without limit.
C. Like other populations, the human population is affected by a variety of factors in the environment.
D. Like other populations, the human population increases and decreases in a cyclical pattern.
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Answer:
Which statement best describes these explanations? ... 20) The time during imprinting when specific behaviors can be learned is ... E) maximizing the population size of the forager. E ... B) members of different populations have different nutritional requirements. ... B) humans cannot choose to change their social behavior.
Answer:
C.) Like other populations, the human population is affected by a variety of factors in the environment.
Explanation:
Yes
PLEASE HELP -- Imagine protein X, destined to span the plasma membrane. Assume that the mRNA carrying the genetic message for protein X has already been translated by ribosomes in a cell culture. If you fractionate the cells, in which fraction would you find protein X? Explain by describing its transit through the cell.
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Answer:
Protein X would be ultimately present in the subcellular fraction containing membrane fragments
Explanation:
It is possible to trace the synthesis and transport of a membrane protein by the following steps:
1- The amino acids of the membrane protein are joined together in the ribosome to form a polypeptide chain (in this case, the protein X).
2- A signal sequence of the growing polypeptide produces the binding of the ribosome to the membrane of the endoplasmic reticulum (ER) and the insertion of this polypeptide chain into the ER.
3-The protein is released into a vesicle from the ER to be exported to the Golgi complex.
4- The membrane protein is transported by the Golgi complex to the cell membrane by the formation of a secretory vesicle that fuses with the plasma membrane, thus being finally embedded in the lipid bilayer.
Protein X should be present in the subcellular fraction that comprise of membrane fragments
The fraction that should be measured the protein X:
Here the synthesis should be traced and the membrane protein transport should be applied by using the following steps:
Here the amino acids of the membrane protein should be connected together so that the polypeptide chain should be created. A signal sequence with respect to the polypeptide should be grown that generated the ribosome binding. Now the protein should be relased into the vesicle. At last, the protein of the membrane should be transported to the cell membrane.Learn more about cell here: https://brainly.com/question/13250146
Describe how an enzyme’s structure affects its function:
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Answer:
Most enzymes are proteins and therefore their function is specific to their structure. Enzymes function as a catalyst to increase the rate of virtually all the chemical reactions that take place in a living system
Explanation:
Draw a sketch of your completed DNA model or insert a picture of the model you created. it doesn't have to look perfect !! please help will mark brain least
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Answer:
there
Explanation:
any bodily movement produce by skeletal muscles that requires energy expenditure
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Answer:
Physical activity is defined as any bodily movement produced by skeletal muscles that results in energy expenditure. The energy expenditure can be measured in kilocalories.
I hope this helps
If there is moisture in the atmosphere as the front (pictured) comes through, what effect could it have on temperature and weather?
(ANSWER FAST!!)
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Answer:
c)The temperature would decrease and there would be a chance of thunderstorms.
Explanation:
The temperature would decrease and there would be a chance of thunderstorms. So, the correct option is C.
What is Thunderstorm?A thunderstorm is defined as a storm with lightning and thunder produced by a cumulonimbus cloud, usually producing strong winds, heavy rain, and sometimes hail. Thunderstorms are so called because of the thunderous loud noise they make.
There are three basic elements that lead to the development of thunderstorms: moisture, an unstable atmosphere, and some way for the atmosphere to move where the moisture is necessary to produce thunderstorm clouds and precipitation.
Thus, the temperature would decrease and there would be a chance of thunderstorms. So, the correct option is C.
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Organisms developed _________ that provided its own food source.
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Answer:
autotrophic
Explanation:
An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers. Plants are the most familiar type of autotroph, but there are many different kinds of autotrophic organisms.
Answer:
Explanation:
An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals.
50 points!!!!!!!! will mark brainliest
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Answer:
Answer:
correct. its true and I absolutely agree with you. good job
Explanation:
Bc y=2x-1^3 is the equation
Answer:
Mutualism
Explanation:
It's mutualism because mutualism means with both people benefit from something
Hope that helps !
Which organism is an animal-like protist?
cilia
dinoflagellates
amoeba
truffle
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Study the image.
What do the arrows at point 3 indicate?
A) Warm air is cooling quickly.
B) Cool air is above water.
C) Cool air is warming quickly.
D) Warm air is above land.
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Answer:
The answer is C
Explanation:
Answer:
A
Explanation:
The warm air is sinking meaning that it's cooling down. Cooler air is denser that's why they sink while warmer air is less denser, it rises.
Whoever says it first gets brainliest! Please help. 18 points!
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Answer:
it c
Explanation:
Answer: d
E
xplanation:
Please help! I am so confused, please just help me understand this thing! I'm desperate
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Answer:
i dont even know
Explanation:
bc its to hard to understand
What was the Aristotelian philosophy of the history of the Earth? How did this affect their motivation for studying geography? Why?
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Answer:
For nearly 1,000 years, Aristotle’s view of a stationary Earth at the center of a revolving universe dominated natural philosophy, the name that scholars of the time used for studies of the physical world.
Explanation:
Use organic in a sentence.
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Answer:
Nowadays, we are having organic vegetables.
Answer:
The apple that I bought today has never been sprayed with pesticides, so they labeled it as organic!
or
Hydrogen is an organic compound
Urine is produced by the body to rid itself of wastes the normal chemical composition of urine is mostly water but it also includes nitrogenous molecules creatine and other metabolic waste units urine is a solution that can be greater than 95% of water what property of water makes watee so helpful in ridding the body of waste
A.water cohesive forces create surface tension upon its surface
B. Water is a versatile solvent
C. Water is expands upon freezing
D.water has a high specific heat
ANSWER FAST PLSSS
Answers
Answer:
B. Water is a versatile solvent
Explanation:
Water is said to possess certain properties that gives it its unique attribute. These properties make it a vital component of life as it makes certain phenomena possible. According to this question, water, which makes up majority of urine content, aids the excretion of certain wastes such as nitrogenous molecules from the body.
Water is able to aid in this excretory function due to its VERSATILITY AS A SOLVENT. Water is said to dissolve more substances than any other solvent. This allows it to transport dissolved substances including waste products out of the body.
Give two names for a hydrogen atom with a missing electron
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Answer:
Cation,anion
Explanation:
Cardiac muscular tissue and its function
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Answer:
Yes That Is True!
Explanation:
Answer:
Cardiac muscle tissue works to keep your heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control. It does this through specialized cells called pacemaker cells. These control the contractions of your heart.
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